sewage letting的用法和樣例：
例句
- Stream standards refer to quality of receiving water downstream from the origin of sewage discharge.
水體標準是指污水排放點下游的受納水體的水質。 - In addition,we will proceed with the implementation of Stage II of the strategic sewage disposal scheme once the preferred scheme has been chosen.
另外還會在決定方案后，進行策略性污水排放計劃第二階段工程。
